You know that pressure remains pretty high

要知道血流的压强在流入毛细动脉之前
until you get down to the arteriole levels;

都会维持在一个较高水平
we learned that when we talked about the circulatory system.

这点我们在上循环系统时就学过的
The pressure here is fairly high,

这里的压强相当的高
it might be 70 or 80 millimeters of mercury.

大概七十或八十毫米汞柱
This is the pressure that drives filtration in the glomerulus.

正是这一压强促成了肾小球中的过滤
The green arrow, which just appeared up here,

出现在这里的绿色箭头
is supposed to indicate for this glomerulus right there filtration happens.

表示过滤发生在这个肾小球里
Because of the pressure drop in the glomerulus,

由于肾小球中的压力差
the low pressure in Bowman's space, this space that surrounds it,

绕在肾小球周围的鲍曼氏囊内为低压
fluid is driven through the walls of the capillary and collected outside.

液体经毛细血管壁被压入外周并收集起来
What is produced there is really, what I called last time,

那里产生的东西是我上次提到过的